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Analog Devices Inc./Maxim Integrated MAX40111ANT+T
- Part No.:
- MAX40111ANT+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 6-XFBGA, WLBGA
- Datasheet:
-
MAX40111ANT+T.pdf
- Description:
- 15MHZ LOW CURRENT LOW OFFSET RRI
- Quantity:
- Payment:
- Shipping:
Inventory:3,639
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Product details
Overview
MAX40111ANT+T from Maxim Integrated is a precision, low-noise, rail-to-rail input/output operational amplifier optimized for high-fidelity signal conditioning in space-constrained, low-power systems. It delivers 15MHz gain-bandwidth, 12.7nV/√Hz input voltage noise, and 30μV (typ) input offset voltage after power-on auto-calibration - enabling accurate amplification of weak sensor signals in portable medical and industrial IoT devices.
For engineers reviewing the MAX40111ANT+T datasheet, MAX40111ANT+T pinout, MAX40111ANT+T application, or MAX40111ANT+T equivalent, key selection criteria include its sub-1ms power-up time, <1pA input bias current at +25°C, shutdown current of 1μA, WLP package footprint (0.4mm pitch), and guaranteed performance across –40°C to +125°C.
Technical Context
The MAX40111ANT+T employs an ultra-quiet integrated charge pump that generates an internal rail 1V above VDD to power a PMOS input stage - eliminating crossover distortion without external components or user intervention. Its auto-calibration circuitry reduces input offset voltage to ≤30μV at power-up and maintains stability over temperature via 1–6μV/°C drift specification.
This architecture enables true rail-to-rail input operation (–0.1V to VDD + 0.1V) and output swing within 20mV of rails (at 10kΩ load), while sustaining 7V/μs slew rate and stable operation with up to 300pF capacitive load - critical for driving SAR ADC inputs and active filter stages.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth Product | 15MHz - supports stable closed-loop gain up to 10× at 1.5MHz or unity-gain buffer operation at full bandwidth. |
| Input Voltage Noise Density | 12.7nV/√Hz @ 10kHz - preserves SNR in low-level photodiode or strain gauge signal chains. |
| Input Offset Voltage (typ) | 30μV after power-on auto-cal - eliminates manual trimming and reduces system-level DC error in precision measurement paths. |
| Supply Current (typ) | 750μA - enables continuous operation in battery-powered wearable and portable medical devices. |
| Shutdown Current | 1μA - allows aggressive power gating in duty-cycled sensor front-ends without sacrificing wake-up latency. |
| Power-Up Time | 0.6–1ms - includes full VOS auto-calibration; ensures ready-to-use precision within one millisecond of supply ramp. |
| Input Bias Current (max) | 200pA @ –40°C to +125°C - minimizes voltage error when interfacing with high-impedance sensors (e.g., pH electrodes, piezoresistive elements). |
Pinout & Package
The MAX40111ANT+T is housed in a 6-bump wafer-level package (WLP) with 0.4mm pitch, measuring 1.2mm × 0.8mm - optimized for ultra-dense PCB layouts in wearables and miniaturized medical sensors.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| B1 | IN+ | Noninverting input - accepts rail-to-rail common-mode voltages from –0.1V to VDD + 0.1V; low 2.5pF capacitance minimizes filter interaction. |
| B2 | GND | Ground reference - dedicated low-impedance return path for input stage and output stage; must be connected to clean system ground plane. |
| B3 | IN- | Inverting input - matched to IN+ for common-mode rejection; enables differential sensing and precision feedback configurations. |
| A3 | OUT | Amplifier output - drives loads down to 600Ω with <50mV headroom to rails; stable with ≥300pF capacitive load. |
| A2 | SHDN | Active-low shutdown control - logic-compatible with 1.8V/3.3V microcontrollers; places inputs/outputs in high-Z state during sleep. |
| A1 | VDD | Positive supply - operates from 1.8V to 5.5V; PSRR of 78–95dB suppresses supply noise coupling into signal path. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated charge-pump input stage | Eliminates crossover distortion in noninverting configurations (e.g., Sallen-Key filters) without external compensation or layout constraints. |
| Power-on auto-calibration | Reduces input offset to ≤30μV at +25°C and ≤600μV over full –40°C to +125°C range - no external calibration circuitry required. |
| Rail-to-rail I/O with wide CMVR | Supports single-supply operation from 1.8V; input extends 100mV beyond rails, output swings within 20mV - maximizes dynamic range for ADC drivers. |
| EMI-hardened design | Internal filtering rejects RF interference up to 1GHz - critical for reliable operation near wireless transceivers in wearable and IoT end equipment. |
| Ultra-low input bias current | <1pA at +25°C, ≤200pA over full temperature range - enables direct connection to photodiodes, ion-selective electrodes, and other picoamp-level sources. |
Applications
| Wearable Biosensor Front-End | Portable Blood Pressure Monitor |
|---|---|
|
Use Scenario: Amplifying microvolt-level ECG or PPG signals from dry electrodes in compact wrist-worn devices. IC Role / Device Role / Timing Role: Precision DC-coupled transimpedance and gain stage preceding 12-bit SAR ADC; provides <1μs transient recovery after electrode contact bounce. Use Value: 12.7nV/√Hz noise density and <1pA input bias current preserve signal integrity from high-impedance skin interfaces without guard traces or shielding. |
Use Scenario: Conditioning analog outputs from MEMS pressure sensors in handheld sphygmomanometers. IC Role / Device Role / Timing Role: Rail-to-rail buffer and anti-aliasing filter driver for MAX11645 12-bit ADC; operates from 3.3V coin-cell supply. Use Value: 750μA quiescent current and 1μA shutdown mode extend battery life; 15MHz GBW supports fast step-response during cuff inflation/deflation cycles. |
| Industrial Temperature Transmitter | Optical Smoke Detector Signal Chain |
|
Use Scenario: Amplifying low-drift mV/°C outputs from RTD or thermistor bridges in DIN-rail mounted process sensors. IC Role / Device Role / Timing Role: Precision instrumentation amplifier front-end with programmable gain; operates continuously across –40°C to +125°C ambient. Use Value: 6μV/°C max VOS drift and 90dB CMRR maintain accuracy despite thermal gradients on PCB; WLP package withstands reflow and conformal coating. |
Use Scenario: Converting photocurrent from dual-wavelength IR/UV photodiodes in life-safety smoke chambers. IC Role / Device Role / Timing Role: Low-noise transimpedance amplifier with shutdown control synchronized to LED pulsing cycle. Use Value: Sub-1ms power-up time aligns with 100ms LED strobe windows; <1pA input bias prevents dark-current-induced baseline shift in zero-smoke conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX44260ANT+T | Same WLP package, but 10MHz GBW, higher 18nV/√Hz noise, and no integrated charge pump - exhibits measurable crossover distortion in noninverting filters. | Limited to lower-bandwidth sensor buffering; unsuitable for 12–14-bit SAR ADC drivers requiring distortion-free settling. | Select when cost sensitivity outweighs need for ultra-low distortion and 15MHz bandwidth. |
| OPA333AIDBVR | Zero-drift architecture with 0.1μV/°C drift, but 350μA supply current, 350kHz GBW, and SOT-23-5 packaging - lacks shutdown and rail-to-rail output swing. | Better for ultra-stable DC offsets in low-speed data loggers; cannot drive capacitive ADC inputs or support fast power cycling. | Select only for sub-100kHz DC-critical applications where auto-zero drift cancellation is prioritized over speed and power efficiency. |
Compared with MAX40111ANT+T, MAX44260ANT+T trades bandwidth and distortion performance for lower cost, while OPA333AIDBVR offers superior long-term DC stability at the expense of speed, power, and integration - making MAX40111ANT+T the optimal choice for high-resolution, low-power, high-speed sensor signal chains.
Availability
MAX40111ANT+T is available at Aetrix Electronics and suitable for wearable biosensors, portable medical monitors, and industrial temperature transmitters requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX40111ANT+T includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Maxim Integrated (now part of Analog Devices) designs high-performance analog and mixed-signal ICs for demanding industrial, medical, and communications applications - emphasizing precision, low power, and robustness.
The MAX40111ANT+T belongs to Maxim's precision op-amp family targeting ultra-low-noise, rail-to-rail signal conditioning in battery-operated and space-constrained systems - specifically engineered for sensor front-ends and high-resolution ADC drivers.
FAQ
What is the maximum capacitive load the MAX40111ANT+T can drive stably?
The MAX40111ANT+T is specified to remain stable with up to 300pF capacitive load at the output, as confirmed in the Electrical Characteristics table. This capability enables direct connection to ADC input capacitors and RC anti-aliasing filters without external isolation resistors - critical for maintaining signal fidelity in high-resolution data acquisition systems using the MAX40111ANT+T.
Does the MAX40111ANT+T require external components for its power-on auto-calibration?
No, the MAX40111ANT+T performs full input offset voltage auto-calibration internally on every power-up event, completing within 1ms. No external capacitors, resistors, or calibration firmware are needed - the MAX40111ANT+T achieves ≤30μV (typ) VOS at +25°C autonomously, simplifying system design and reducing BOM count.
Can the MAX40111ANT+T operate from a 1.8V supply while maintaining rail-to-rail output swing?
Yes, the MAX40111ANT+T is fully specified from 1.8V to 5.5V. At 1.8V supply, its output swings within 20mV of GND and within 40mV of VDD under 10kΩ load - preserving >95% of available dynamic range. This makes the MAX40111ANT+T ideal for single-cell Li-ion or coin-cell powered applications where supply headroom is minimal.
How does the shutdown mode affect the input offset voltage calibration of the MAX40111ANT+T?
The MAX40111ANT+T retains its power-up auto-calibrated input offset voltage setting when entering or exiting shutdown mode. The SHDN pin places inputs and output in high-impedance state while drawing only 1μA, but no recalibration occurs - ensuring consistent DC accuracy across sleep/wake cycles without reintroducing offset uncertainty. This behavior is explicitly documented for the MAX40111ANT+T in the Applications Information section.
Is the MAX40111ANT+T pin-compatible with other members of the MAX40110/MAX40111 family?
The MAX40111ANT+T shares identical pinout and functionality with the MAX40110AYT+T (μDFN variant), differing only in package type - both use the same 6-pin configuration (IN+, GND, IN-, OUT, SHDN, VDD) and electrical specifications. However, due to different land patterns (WLP vs. μDFN), PCB layout is not interchangeable; the MAX40111ANT+T requires its specific 0.4mm-pitch WLP footprint.
MAX40111ANT+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 6-XFBGA, WLBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Standard
- Number of Circuits:
- 1
- Output Type:
- Single Ended, Rail-to-Rail
- Slew Rate:
- 7V/µs
- Gain Bandwidth Product:
- 15 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 1 pA
- Voltage - Input Offset:
- 30 µV
- Current - Supply:
- 750µA
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 1.7 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-WLP (1.24x0.84)
MAX40111ANT+T FAQ
1.How can I place an order for MAX40111ANT+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX40111ANT+T on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MAX40111ANT+T reliable?
The price and inventory of MAX40111ANT+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX40111ANT+T is usually 5 days.
3.What payment methods are accepted for MAX40111ANT+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX40111ANT+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX40111ANT+T?
MAX40111ANT+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX40111ANT+T order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MAX40111ANT+T?
For technical support, including MAX40111ANT+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX40111ANT+T requirements.
6.How does Aetrix verify that MAX40111ANT+T is sourced from the original manufacturer or authorized distributors?
All MAX40111ANT+T products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MAX40111ANT+T meets industry standards.
7.What is the process for return or replacement of MAX40111ANT+T?
All MAX40111ANT+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX40111ANT+T, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MAX40111ANT+T part is unused and in its original packaging.
Return procedure for MAX40111ANT+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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